According to the article, they built a total of 1574 planes. This number happens to be equal to 2 * 787. The significance of this would be that 787 is also the model number of one of Boeings current generation jetliner, the Boeing 787 Dreamliner. I, as a small-time-wannabe number nerd and small-time-wannabe airplane nerd, reacted positively when I happened to see this connection.

I have no idea if there is any intent behind this specific number of produced planes, but I suspect that there would be people at Boeing who feel the same kind of mild satisfaction as I did when I saw the number of aircraft produced.